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// For backward compatibility, fields of C unions declared in system headers
// that have non-trivial ObjC ownership qualifications are marked as unavailable
// unless the qualifier is explicit and __strong.
#pragma clang system_header
typedef __strong id StrongID;
typedef union {
id f0;
_Nonnull id f1;
__weak id f2;
StrongID f3;
} U0_SystemHeader;
typedef union { // expected-note {{'U1_SystemHeader' has subobjects that are non-trivial to destruct}} expected-note {{'U1_SystemHeader' has subobjects that are non-trivial to copy}}
__strong id f0; // expected-note {{f0 has type '__strong id' that is non-trivial to destruct}} expected-note {{f0 has type '__strong id' that is non-trivial to copy}}
_Nonnull id f1;
} U1_SystemHeader;
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